* created TypeVariable will not interoperate with any JDK TypeVariable. But this is OK: We
         * don't _want_ our new TypeVariable to be equal to the JDK TypeVariable because it has
         * _different bounds_ than the JDK TypeVariable. And it wouldn't make sense for our new
         * TypeVariable to be equal to any _other_ JDK TypeVariable, either, because any other JDK

 * - The target JVM version
 * - Workarounds which may affect the way the compilation is performed
 *
 * The compilation workarounds include:
 * - Using JDK internal classes
 * - Using Java standard library APIs that were introduced after the JVM version they are targeting
 *
 * All of these workarounds should be generally avoided, but, with this data we can configure the

        assertActivationWithProblems(profile, newContext(null, newProperties("rubbish")), "invalid JDK version");
        assertActivationWithProblems(profile, newContext(null, newProperties("1.a.0_09")), "invalid JDK version");
        assertActivationWithProblems(profile, newContext(null, newProperties("1.a.2.b")), "invalid JDK version");
    }

    if: github.ref == 'refs/heads/master' || contains(github.event.pull_request.labels.*.name, 'containers')

    steps:
      - name: Checkout
        uses: actions/checkout@v6

      - name: Configure JDK
        uses: actions/setup-java@v5
        with:
          distribution: 'zulu'
          java-version: 17

      - name: Setup Gradle
        uses: gradle/actions/setup-gradle@v5

import org.apache.maven.toolchain.model.ToolchainModel;
import org.codehaus.plexus.util.xml.Xpp3Dom;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * JDK toolchain factory.
 * This is a <code>ToolchainFactory</code> Plexus component registered with
 * <code>jdk</code> hint.
 *
 * @since 2.0.9, renamed from <code>DefaultJavaToolchainFactory</code> in 3.2.4

import java.util.Set;
import java.util.function.BiFunction;
import java.util.function.Function;
import java.util.function.Predicate;

/**
 * This should be removed when https://bugs.openjdk.org/browse/JDK-8323729
 * is released in our minimum JDK.
 */
class ImmutableCollections {

    private static final Map<?, ?> EMPTY_MAP = new AbstractImmutableMap<>() {
        @Override
        public Set<Entry<Object, Object>> entrySet() {

    - name: Disable checksum offloading
      # See: https://github.com/actions/virtual-environments/issues/1187#issuecomment-686735760
      run: sudo ethtool -K eth0 tx off rx off

    # Install and setup JDK 17
    - name: Setup JDK 17
      uses: actions/setup-java@v5
      with:
        distribution: temurin
        java-version: 17

    # Initializes the CodeQL tools for scanning.
    - name: Initialize CodeQL

        verify(logger).debug("Toolchain {} doesn't match required property: {}", toolchain, "name");
    }

    @Test
    void testEquals() {
        ToolchainModel tm1 = new ToolchainModel();
        tm1.setType("jdk");
        tm1.addProvide("version", "1.5");
        tm1.addProvide("vendor", "sun");
        Xpp3Dom configuration1 = new Xpp3Dom("configuration");
        Xpp3Dom jdkHome1 = new Xpp3Dom("jdkHome");

   * Returns the {@link Method} instance for {@link #testAddAll_nullUnsupported()} so that tests can
   * suppress it with {@code FeatureSpecificTestSuiteBuilder.suppressing()} until <a
   * href="https://bugs.openjdk.org/browse/JDK-5045147">JDK-5045147</a> is fixed.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getAddAllNullUnsupportedMethod() {

| Android default  | ✅      | Android 10+  | [BoringSSL]     |                                                              |
| [GraalVM]        | ✅      |              | [OpenJDK]       | Only actively tested with JDK 11, not with 8 target          |
| [Bouncy Castle]  | ✅      |              | [Bouncy Castle] | [Tracking bug.][bug5698]                                     |